package collection;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class ListDemo {
    public static void main(String[] args) {
        List<String> list = new ArrayList<>();
        list.add("one");
        list.add("two");
        list.add("three");
        list.add("four");
        list.add("five");
        System.out.println("list:"+list);

        for (int i = 0; i < list.size(); i++) {
            System.out.println(list.get(i  ));
        }
        String e = list.get(2);
        System.out.println(e);

        Iterator<String> it = list.iterator();
        while (it.hasNext()){
            System.out.println(it.next());
        }
        for (String str: list){
            System.out.println(str);
        }



        String old = list.set(2,"six");
        System.out.println("list:"+list);
        System.out.println(old);

        String s = list.remove(2);
        System.out.println("list:"+list);
        System.out.println(s);



        list.add(3,"seven");
        System.out.println(list);


    }
}
